package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.result.Result;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 营业额统计表
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result<TurnoverReportVO> turnoverStatistics(LocalDate begin, LocalDate end) {
        //获取时间区间内的每一天的时间
        // 定义一个list用来封装每一天的时间
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        // 插入第一天后的每一天的时间到list集合中
        while (!begin.equals(end)) {//while循环 第一天不等于最后一天
            begin = begin.plusDays(1);// +1
            dateList.add(begin);
        }
        //2.5 定义一个list用来封装每一天的营业额
        List<Double> turnoverList=new ArrayList<>();
        //2.根据条件查询的每一天的营业额数据
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);//获取当天的最小时间，年月日时分秒 00:00:00
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);//获取当天的最大时间，年月日时分秒 23:59:59
            // 查询mysql
            Map map = new HashMap();
            map.put("status", Orders.COMPLETED);
            map.put("begin", beginTime);
            map.put("end", endTime);
            Double turnover = orderMapper.sumByMap(map);
            //没有营业额null改为0进行统计数据
            turnoverList.add(turnover == null ? 0 : turnover);
        }
            //封装数据
            TurnoverReportVO vo = TurnoverReportVO.builder()
                    .dateList(StringUtils.join(dateList, ","))
                    .turnoverList(StringUtils.join(turnoverList, ","))
                    .build();
        return Result.success(vo);
    }

    /**
     * 用户使用统计表
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result<UserReportVO> userStatistics(LocalDate begin, LocalDate end) {
        //获取时间区间内的每一天的时间
        // 定义一个list用来封装每一天的时间
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        // 插入第一天后的每一天的时间到list集合中
        while (!begin.equals(end)){//while循环 第一天不等于最后一天
            begin = begin.plusDays(1);// +1
            dateList.add(begin);
        }
        // 定义一个list用来封装new用户
        List<Integer>newUserCountList=new ArrayList<>();
        // 定义一个list用来封装total用户
        List<Integer>totalUserCountList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);//获取当天的最小时间，年月日时分秒 00:00:00
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);//获取当天的最大时间，年月日时分秒 23:59:59
            // 查询mysql
            Map map=new HashMap();
            map.put("begin",beginTime);
            Integer newUser = userMapper.getUserCount(map);
            map.put("end",endTime);
            Integer totalUser = userMapper.getUserCount(map);
            newUserCountList.add(newUser);
            totalUserCountList.add(totalUser);
        }
        //封装数据
        UserReportVO vo = UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserCountList, ","))
                .totalUserList(StringUtils.join(totalUserCountList, ","))
                .build();
        return Result.success(vo);
    }

    /**
     * 根据时间区间统计订单数量
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result<OrderReportVO> ordersStatistics(LocalDate begin, LocalDate end) {
        //获取时间区间内的每一天的时间
        // 定义一个list用来封装每一天的时间
        List<LocalDate>dateList=new ArrayList<>();
        dateList.add(begin);
        // 插入第一天后的每一天的时间到list集合中
        while (!begin.equals(end)){//while循环 第一天不等于最后一天
            begin=begin.plusDays(1);// +1
            dateList.add(begin);
        }
        // 定义一个list用来封装
        List<Integer>totalOrdersCountList=new ArrayList<>();
        List<Integer>validOrdersCountList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //// 查询mysql
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            Integer totalOrders = orderMapper.getOrderCount(map);
            map.put("status",Orders.COMPLETED);
            Integer validOrders = orderMapper.getOrderCount(map);
            totalOrdersCountList.add(totalOrders);
            validOrdersCountList.add(validOrders);
        }
        //2.7 获取时间区间内的总订单数和有效订单数以及订单完成率
        //聚合求和总订单数
        Integer totalOrdersCount = totalOrdersCountList.stream().reduce(Integer::sum).get();
        Integer validOrdersCoun = validOrdersCountList.stream().reduce(Integer::sum).get();
        //订单完成率=有效订单数/总订单数
        Double orderCompletionRate = 0.0;
        if (totalOrdersCount!=0){
             orderCompletionRate=validOrdersCoun.doubleValue()/totalOrdersCount;
        }
        //封装
        OrderReportVO vo = OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(totalOrdersCountList, ","))
                .validOrderCountList(StringUtils.join(validOrdersCountList, ","))
                .validOrderCount(validOrdersCoun)
                .totalOrderCount(totalOrdersCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

        return Result.success(vo);
    }

    /**
     * 查询指定时间区间内的销量排名top10
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
            //1.转化时间格式
            //1.1.获取当天的最小时间，年月日时分秒 00:00
            LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
            //1.2 获取当天的最大时间，年月日时分秒 59:59
            LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

            //2.根据时间区间查询销量(订单表和订单详情表),包含菜品名称，以及对应的销量数
            List<GoodsSalesDTO> goodsSalesDTOS=orderMapper.getSalesTop10(beginTime,endTime);
            //3.获取商品名称列表
            List<String> nameList = goodsSalesDTOS.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
            //4.获取销量列表
            List<Integer> numberList = goodsSalesDTOS.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
            //5.返回数据
            SalesTop10ReportVO vo = SalesTop10ReportVO.builder()
                    .nameList(StringUtils.join(nameList, ","))
                    .numberList(StringUtils.join(numberList, ","))
                    .build();
            return vo;

    }

    /**导出近30天的运营数据报表
     * @param response
     **/
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();

        }catch (IOException e){
            e.printStackTrace();
        }
    }
}
